Bug 1516366 - Remove unused mFirstBaseNodeWithHref member. r=smaug

This is done via SetBaseURIUsingFirstBaseWithHref now.

Differential Revision: https://phabricator.services.mozilla.com/D15353

dom/base/nsDocument.cpp

@@ -1775,7 +1775,6 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsDocument)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mChannel)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLayoutHistoryState)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOnloadBlocker)
-  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFirstBaseNodeWithHref)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDOMImplementation)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mImageMaps)
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOrientationPendingPromise)
@@ -1866,7 +1865,6 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsDocument)
 
   tmp->mCachedRootElement = nullptr;  // Avoid a dangling pointer
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mDisplayDocument)
-  NS_IMPL_CYCLE_COLLECTION_UNLINK(mFirstBaseNodeWithHref)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mMaybeEndOutermostXBLUpdateRunner)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mDOMImplementation)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mImageMaps)

dom/base/nsDocument.h

@@ -176,9 +176,6 @@ class nsDocument : public nsIDocument {
                          NotNull<const Encoding*>& aEncoding,
                          nsHtml5TreeOpExecutor* aExecutor);
 
-  nsIContent* GetFirstBaseNodeWithHref();
-  nsresult SetFirstBaseNodeWithHref(nsIContent* node);
-
 #define NS_DOCUMENT_NOTIFY_OBSERVERS(func_, params_)                          \
   do {                                                                        \
     NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mObservers, nsIDocumentObserver, \
@@ -208,8 +205,6 @@ class nsDocument : public nsIDocument {
 
   friend class nsCallRequestFullscreen;
 
-  nsCOMPtr<nsIContent> mFirstBaseNodeWithHref;
-
  private:
   friend class nsUnblockOnloadEvent;